/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.tsfile.read.expression.impl;

import org.apache.iotdb.tsfile.read.expression.ExpressionType;
import org.apache.iotdb.tsfile.read.expression.IExpression;
import org.apache.iotdb.tsfile.read.expression.IUnaryExpression;
import org.apache.iotdb.tsfile.read.filter.basic.Filter;
import org.apache.iotdb.tsfile.read.filter.factory.FilterFactory;
import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils;

import java.io.Serializable;
import java.nio.ByteBuffer;
import java.util.Objects;

public class GlobalTimeExpression implements IUnaryExpression, Serializable {

    private static final long serialVersionUID = 1146132942359113670L;
    private Filter filter;

    public GlobalTimeExpression(Filter filter) {
        this.filter = filter;
    }

    @Override
    public Filter getFilter() {
        return filter;
    }

    @Override
    public void setFilter(Filter filter) {
        this.filter = filter;
    }

    @Override
    public ExpressionType getType() {
        return ExpressionType.GLOBAL_TIME;
    }

    @Override
    public IExpression clone() {
        return new GlobalTimeExpression(filter.copy());
    }

    @Override
    public void serialize(ByteBuffer byteBuffer) {
        ReadWriteIOUtils.write((byte) getType().ordinal(), byteBuffer);
        filter.serialize(byteBuffer);
    }

    public static GlobalTimeExpression deserialize(ByteBuffer byteBuffer) {
        return new GlobalTimeExpression(FilterFactory.deserialize(byteBuffer));
    }

    @Override
    public String toString() {
        return "[" + this.filter + "]";
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }

        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        GlobalTimeExpression that = (GlobalTimeExpression) o;
        return Objects.equals(toString(), that.toString());
    }

    @Override
    public int hashCode() {
        return Objects.hash(toString());
    }
}
